All the King's Horses (слэш)

MI6 has been compromised, at least one agent inside suspected of working for the criminal mastermind James Moriarty. Bond's assignment is simple: find the mole and resolve the situation. The only catch is that the mission requires something Bond doesn't have in abundance: computer skills. With all of Q-Branch under suspicion he must turn to outside sources, and Mycroft Holmes thinks he has the perfect solution: his youngest brother.
Or: the unholy merging of Reichenbach Falls and Skyfall, and their respective super-villains.